Can't Attack Enemy Satellites Built ON My Planet!

[thebigsilly]

Hi! An AI enemy had a colony planet. I destroyed his population with bombardment, but did not destroy the satellites he had built on his colony. I then colonized the planet. On subsequent turns, I have sent frigates with proper ship-to-ship weaponry to this planet, in an attempt to destroy the satellites - but they refuse to fire on the satellites, despite my using the button functions to specifically order them to do so.
Now, if I ever try to put any ships there, I get combat every turn! It's quite annoying. I'm using Kwok's newest balance mod in this game.
What may I try?